Brazing filler metal suitable for tc4 titanium alloy thin-walled honeycomb structure and its preparation method and brazing method

A technology of honeycomb structure and brazing method, applied in welding equipment, metal processing equipment, welding/cutting medium/material, etc., can solve the problems of reduced shear performance of brazing interface, corrosion of honeycomb panel, long brazing time, etc. , to achieve good interdiffusion, improve brazing quality and reduce welding holding time.

Active Publication Date: 2022-05-27
北京普惠三航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when brazing titanium alloy thin-walled honeycomb structure parts, the brazing temperature is high and the brazing time is long, resulting in too large a diffusion zone during brazing, and the honeycomb wall plate is eroded, resulting in poor performance of the brazing interface, especially brazing The shear performance of the weld interface is greatly reduced

Method used

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  • Brazing filler metal suitable for tc4 titanium alloy thin-walled honeycomb structure and its preparation method and brazing method
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  • Brazing filler metal suitable for tc4 titanium alloy thin-walled honeycomb structure and its preparation method and brazing method

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Effect test

Embodiment 1

[0035] A preparation method for brazing filler metal suitable for TC4 titanium alloy thin-walled honeycomb structure, comprising the following steps: material preparation: see Table 1, the weight percent of the chemical composition of the filler metal is: Ni: 12%; Cu: 15%; Zr: 9%, Be: 0.5%, and the balance is Ti. According to the chemical composition ratio of the above-mentioned solder, weigh the required sponge titanium, sponge zirconium, industrial pure nickel, industrial pure copper, and beryllium powder. Purity not less than 99.5%;

[0036] Vacuum smelting: use a vacuum induction furnace to smelt the raw materials, the melting temperature is 1900°C, the holding time is 0.5h, and the vacuum degree is not lower than 10 -2Pa, cast into ingot, air-cooled to room temperature, repeated smelting 3 times;

[0037] Preparation of brazing filler metal: use amorphous foil stripping equipment, put the melted alloy ingot into the melting crucible of the equipment for melting, the melt...

Embodiment 2

[0045] A preparation method for brazing filler metal suitable for TC4 titanium alloy thin-walled honeycomb structure, comprising the following steps: material preparation: see Table 1, the weight percent of the chemical composition of the filler metal is: Ni: 13.5%; Cu: 16.5%; Zr: 10.5%, Be: 0.4%, and the balance is Ti. According to the chemical composition ratio of the above-mentioned solder, weigh the required sponge titanium, sponge zirconium, industrial pure nickel, industrial pure copper, and beryllium powder. The purity is not less than 99.5%; vacuum smelting: the raw materials are smelted in a vacuum induction furnace, the melting temperature is 1950°C, the holding time is 0.75h, and the vacuum degree is not less than 10 -2 Pa, cast into ingot, air-cooled to room temperature, repeated smelting 3 times;

[0046] Preparation of brazing filler metal: use amorphous foil stripping equipment, put the melted alloy ingot into the melting crucible of the equipment to melt, the m...

Embodiment 3

[0054] A preparation method for brazing filler metal suitable for TC4 titanium alloy thin-walled honeycomb structure, comprising the following steps: material preparation: see Table 1, the weight percent of the chemical composition of the filler metal is: Ni: 15%; Cu: 18%; Zr: 12%, Be: 0.3%, and the balance is Ti. According to the chemical composition ratio of the above-mentioned solder, weigh the required sponge titanium, sponge zirconium, industrial pure nickel, industrial pure copper, and beryllium powder. Purity not less than 99.5%;

[0055] Vacuum smelting: use a vacuum induction furnace to smelt the raw materials, the melting temperature is 2000°C, the holding time is 1h, and the vacuum degree is not lower than 10 -2 Pa, cast into ingot, air-cooled to room temperature, repeated smelting 5 times;

[0056] Preparation of brazing filler metal: use amorphous foil stripping equipment, put the melted alloy ingot into the melting crucible of the equipment for melting, the melt...

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Abstract

The invention discloses a brazing filler metal suitable for TC4 titanium alloy thin-walled honeycomb structure and its preparation method and brazing method. The brazing filler metal includes the following chemical components in weight percentage: Ni: 12% to 15%; Cu: 15% to 18% %; Zr: 9% to 12%, Be: ≤0.5%, and the balance is Ti. The preparation method of the brazing filler metal is as follows: material preparation; vacuum smelting; pressure stripping. The brazing method using the above brazing material is: pre-welding treatment of parts; brazing: brazing temperature is 910°C-930°C, holding time is 0.5h-1h, and cooling after brazing. The brazing filler metal provided by the invention takes into account both the melting point and the diffusion ability, and improves the strength of the brazing joint, especially the shear strength of the brazing joint interface, so as to effectively ensure the reliable connection of the brazing interface; The problem of the climbing height when brazing the honeycomb thin-walled structure with the brazing material can meet the brazing requirements of the current 25mm high honeycomb structure.

Description

technical field [0001] The invention relates to the technical field of brazing, more specifically, it relates to a brazing filler metal suitable for TC4 titanium alloy thin-walled honeycomb structure, a preparation method and a brazing method thereof. Background technique [0002] With the continuous improvement of the flight speed of aerospace vehicles and the urgent need for lightweight overall structures, higher requirements are put forward for the performance of structural materials of aerospace vehicles. Wings, rudder wings, empennage and other products are gradually replaced by high-performance titanium alloys from the original aluminum alloy. The forming method of the parts is also changed from the original riveting, bonding, argon arc welding to superplastic forming / diffusion connection, brazing, electron beam welding, etc. [0003] Brazing technology refers to the welding method of filling the gaps of solid workpieces with liquid solder to connect the metal after t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K35/40B23K1/00B23K1/005B23K1/20B23K3/06
CPCB23K35/40B23K35/325B23K1/20B23K1/00B23K3/06B23K1/206B23K1/0014B23K1/0056
Inventor 雷鹍刘新芹殷智星吕昕宇靳舜尧郭青苗谢秀民李波
Owner 北京普惠三航科技有限公司
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